Russian is the official language of Collective Security Treaty Organisation. Collective Security Treaty Organisation contains Russia. Collective Security Treaty Organisation contains Belarus. Collective Security Treaty Organisation contains Kazakhstan. Collective Security Treaty Organisation contains Armenia. Collective Security Treaty Organisation contains Kyrgyzstan. Collective Security Treaty Organisation contains Tajikistan. Collective Security Treaty Organisation is a military alliance.

Collective Security Treaty Organisation is a international organization. Collective Security Treaty Organisation headquarterses location Moscow. Russia is a member of Collective Security Treaty Organisation. Belarus is a member of Collective Security Treaty Organisation. CSTO Summit is a subtopic of Collective Security Treaty Organisation.